Weblogic 10.3.5 & Windows 2003 Active Directory NO User but Groups

I use OBIEE 11.1.1.5, Weblogic Server 10.3.5 and Active Directory Windows 2003.
I tried to integrate our external LDAP in the Weblogic admin console. The integration worked so far but I have the problem that I only see groups but no user.
When I use a simple LDAP Browser with the same query (as in the settings in the console) I get all the needed user and groups. I have no idea why this is happening.
The strange thing is - when I use the same settings in the RPD (admin tool) I am able to use the LDAP authentication.

Our LDAP structure is OU=MyCompany where CN= all User with their names. And a special group OU=BI with CN= group names like administration and so on. We use the same structure for our Jira and Windows.
Is there something I am missing?